Application of Taguchi Method in Optimizing Charpy Impact Al-Si-Cu Cast Alloys Weld by TIG Welding

EasyChair Preprint no. 9255

Abstract

 The increasing demand for automotive parts of lightweight metals is led engineers and researchers to develop new alloys and/or improve existing with attractive properties and thus, higher performance levels. The Al-Si-Cu (Aluminum-SiliconCopper) cast alloys are among those alloys gaining prominence by automotive industry sectors. The welding quality of Al-Si-Cu alloys can be improved further using Taguchi Design of Experiments (DOE). This research work focuses in optimizing charpy impact of Al-Si-Cu cast alloys weld by TIG welding process. The L9 orthogonal arrays (OA) matrix are chosen with 3-levels and 4- factors (gas flow rate, current, filler rod and gas nozzle cap) are carried out to optimize welding factors for double-V butt joint weld of the aluminum cast alloys. The measured results of charpy impact energies are analyzed by CV* (signal/noise, S/N) and ANOVA (analysis of variance). The higher impact energies are achieved in experiments No.1 and No. 2 with average values of 5.18 and 5.31 Joule respectively, while the lower impact energy is given by experiment No.7 with average value of 4.07Joule. The optimal welding factors of 9L/min gas flow rate, 140A current, ER4043 filler rod and gas nozzle cap number 6 give charpy impact of 5.43 joule and the most affected factors are gas flow rate and filler rod.

Keyphrases: Aluminum Silicon Copper Cast Alloy, impact energy, Microstructures, Taguchi method, TIG

@Booklet{EasyChair:9255,
  author = {Rania Ramadan and Ali M. Hatab and Elhadi I. Dekam},
  title = {Application of Taguchi Method in Optimizing  Charpy Impact Al-Si-Cu Cast Alloys Weld by TIG  Welding},
  howpublished = {EasyChair Preprint no. 9255},

  year = {EasyChair, 2022}}